exclude :test_new_str, 'needs investigation'
exclude :"test_abs", "work in progress"
exclude :"test_argument_error", "work in progress"
exclude :"test_bit_operations", "work in progress"
exclude :"test_four_ops", "work in progress"
exclude :"test_get_flags_and_set_flags", "work in progress"
exclude :"test_mod", "work in progress"
exclude :"test_mod_inverse", "work in progress"
exclude :"test_negative_p", "work in progress"
exclude :"test_new", "work in progress"
exclude :"test_to_int", "work in progress"
exclude :"test_to_str", "work in progress"
exclude :"test_unary_plus_minus", "work in progress"
